#include using namespace std; using ll=long long; using pll=pair; using tll=tuple; using ld=long double; const ll INF=(1ll<<60); #define rep(i,n) for (ll i=0;i<(ll)(n);i++) #define all(v) v.begin(),v.end() template void chmin(T &a,T b){ if(a>b){ a=b; } } template void chmax(T &a,T b){ if(a> y; vector v; for(ll a=0;a<=100;a++){ for(ll b=a+1;b<=100;b++){ if((fx+a)%b==y) v.emplace_back(a,b); } } vector vt; ll x=-1; for(ll i=1;i<=100;i++){ set st; bool ok=true; for(auto &[a,b]:v){ ll k=(i+a)%b; if(st.count(k)) ok=false; st.insert(k); } if(ok){ for(auto &[a,b]:v){ ll k=(i+a)%b; vt.push_back({k,a,b}); } x=i; break; } } cout << "? " << x << endl; cin >> y; for(auto &[k,a,b]:vt){ if(y==k){ cout << "! " << a << " " << b << endl; return 0; } } }